俱舍論疏 8.133

8.133

論「然色等蘊至於餘可說」，明四識住據別別說，於一一蘊生種種喜、染也。故識不同餘四蘊故，不立識住。

The verse commentary states: "However, the skandhas of form and so on [...] can be spoken of regarding the others." This clarifies that the four stations of consciousness are based on individual analysis: various kinds of delight and craving arise toward each single skandha. Therefore, because consciousness is not the same as the other four skandhas, it is not established as a station of consciousness.